MikroTik CRS504-4XQ-IN
The budget 100GbE QSFP28 desktop switch for 2–4 DGX Spark clusters
Hardware
In plain English
A compact, quiet 100G network switch (~$799) that lets up to 4 DGX Sparks talk to each other at 100 Gbps for high-speed clustering.
Technically
A 4-port 100G QSFP28 compact desktop/rack switch with Marvell Prestera ASIC (~$799). Consumes ~25W, runs low-noise fans, and supports RouterOS v7 / SwOS with RoCEv2 RDMA pass-through, making it the de facto desktop switch for connecting 2 to 4 DGX Spark GB10 units.